body {
  background: linear-gradient(120deg, #f6d365 0%, #fda085 100%);
  font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
  color: #333;
}

h1, h2, h3, h4 {
  color: #2d3a4b;
  font-weight: 700;
  letter-spacing: 1px;
}

.container-fluid {
  background: rgba(255,255,255,0.95);
  border-radius: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  margin-top: 32px;
  padding: 32px 24px;
}

.sidebar-nav {
  margin-top: 20px;
  padding: 0;
  list-style: none;
  background: linear-gradient(120deg, #89f7fe 0%, #66a6ff 100%);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(102,166,255,0.12);
  padding: 16px 0;
}
.sidebar-nav li {
  margin: 12px 0;
  text-align: center;
}
.sidebar-nav a {
  color: #fff;
  font-weight: 500;
  text-decoration: none;
  padding: 8px 18px;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
  display: inline-block;
}
.sidebar-nav a:hover {
  background: #fff;
  color: #66a6ff;
}

.card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  padding: 24px;
  margin-bottom: 24px;
}

.btn-primary, .btn-main {
  background: linear-gradient(90deg, #f6d365 0%, #fda085 100%);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px 20px;
  font-weight: 600;
  transition: box-shadow 0.2s, background 0.2s;
  box-shadow: 0 2px 8px rgba(253,160,133,0.12);
}
.btn-primary:hover, .btn-main:hover {
  background: linear-gradient(90deg, #fda085 0%, #f6d365 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(253,160,133,0.18);
}

ul, li {
  font-size: 16px;
}

hr {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, #f6d365 0%, #fda085 100%);
  margin: 18px 0;
}

.text-success {
  color: #43e97b !important;
}
.text-danger {
  color: #fd5c63 !important;
}
.text-warning {
  color: #f6d365 !important;
}
.text-muted {
  color: #888 !important;
}
